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2.5 MHz feedforward beam loading compensation in the Fermilab Main Injector
There are five 2.5 MHz ferrite cavities (h = 28) in the Main Injector with an R/Q of 500 that are presently used for coalescing for the Tevatron. For use with the Fermilab Recycler, feedforward (FF) beam loading compensation (BLC) is required on these cavities because they will be required to operate at a net of 2 kV. Under current Recycler beam conditions, the beam-induced voltage is of this order. Recently a system using a digital bucket delay module operating at 53 MHz (h = 588) was used to produce a one-turn-delay feedforward signal. This signal was then combined with the low level RF signal to the 2.5 MHz cavities to cancel the beam induced voltage. During current operation they have shown consistently to operate with over a 20 dB reduction in beam loading.
Date:
May 19, 2003
Creator:
Dey, Joseph E.; Kourbanis, Ioanis & Steimel, James
Object Type:
Article
System:
The UNT Digital Library
3,2-HOPO Complexes of Near-Infra-Red (NIR) Emitting Lanthanides: Sensitization of Ho(III) and Pr(III) in Aqueous Solution
There is a growing interest in Near Infra-Red (NIR) emission originating from organic complexes of Ln{sup III} cations. As a major impetus, biological tissues are considerably more transparent at these low energy wavelengths when compared to visible radiation, which facilitates deeper penetration of incident and emitted light. Furthermore, the long luminescence lifetimes of Ln{sup III} complexes (eg. Yb{sup III}, {tau}{sub rad} {approx} 1 ms) when compared to typical organic molecules can be utilized to vastly improve signal to noise ratios by employing time-gating techniques. While the improved quantum yield of Yb{sub III} complexes when compared to other NIR emitters favors their use for bioimaging applications, there has also been significant interest in the sensitized emission from other 4f metals such as Ln = Nd, Ho, Pr and Er which have well recognized applications as solid state laser materials (eg. Nd {approx} 1.06 {micro}m, Ho {approx} 2.09 {micro}m), and in telecommunications (eg. Er {approx} 1.54 {micro}m) where they can be used for amplification of optical signals. As a result of their weak (Laporte forbidden) f-f absorptions, the direct excitation of Ln{sup III} cations is inefficient, and sensitization of the metal emission is more effectively achieved using the so-called antenna effect. We …
Date:
May 19, 2008
Creator:
Moore, Evan G.; Szigethy, Geza; Xu, Jide; Palsson, Lars-Olof; Beeby, Andrew & Raymond, Kenneth N.
Object Type:
Article
System:
The UNT Digital Library
9-11 Commission Hearing #11, May 19, 2004, Part 2
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes testimony from former Mayor of New York City, Rudolph W. Giuliani.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #11, May 19, 2004, Part 3
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the fourth panel on the state of emergency preparedness across the nation, with testimony from Dennis Smith, Jerome M. Hauer, and Edward P. Plaugher.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #11, May 19, 2004, Part 4
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the fourth panel on emergency preparedness throughout the nation and includes testimony from Michael Bloomberg, Mayor of New York.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
9-11 Commission Hearing #,11 May 19, 2004, Part 5
Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the fourth panel on emergency preparedness throughout the nation with testimony from Secretary of Homeland Security, Thomas J. Ridge.
Date:
May 19, 2004
Creator:
National Commission on Terrorist Attacks upon the United States
Object Type:
Video
System:
The UNT Digital Library
53 MHZ Feedforward beam loading compensation in the Fermilab main injector
53 MHz feedforward beam loading compensation is crucial to all operations of the Main Injector. Recently a system using a fundamental frequency down converter mixer, a digital bucket delay module and a fundamental frequency up converter mixer were used to produce a one-turn-delay feedforward signal. This signal was then combined with the low level RF signal to the cavities to cancel the transient beam induced voltage. During operation they have shown consistently over 20 dB reduction in side-band voltage around the fundamental frequency during Proton coalescing and over 14 dB in multi-batch antiproton coalescing.
Date:
May 19, 2003
Creator:
al., Joseph E Dey et
Object Type:
Article
System:
The UNT Digital Library
100 Area excavation treatability study data validation report
This report presents the results of sampling and chemical analyses at Hanford Reservation. The samples were analyzed by Thermo-Analytic Laboratories and Roy F. Weston Laboratories using US Environmental Protection Agency CLP protocols. Sample analyses included: volatile organics; semivolatile organics; inorganics; and general chemical parameters. The data from the chemical analyses were reviewed and validated to verify that reported sample results were of sufficient quality to support decisions regarding remedial actions performed at this site.
Date:
May 19, 1994
Creator:
Frain, J. M.
Object Type:
Report
System:
The UNT Digital Library
242-A Control System device logic software documentation. Revision 2
A Distributive Process Control system was purchased by Project B-534. This computer-based control system, called the Monitor and Control System (MCS), was installed in the 242-A Evaporator located in the 200 East Area. The purpose of the MCS is to monitor and control the Evaporator and Monitor a number of alarms and other signals from various Tank Farm facilities. Applications software for the MCS was developed by the Waste Treatment System Engineering Group of Westinghouse. This document describes the Device Logic for this system.
Date:
May 19, 1995
Creator:
Berger, J. F.
Object Type:
Report
System:
The UNT Digital Library
1983 Texas Air control Board Summary of Total Suspended Particulate Data
Report documenting air quality measurements throughout the state of Texas for calendar year 1983, including a summary and information about specific pollutants.
Date:
May 19, 1986
Creator:
Texas Air Control Board
Object Type:
Report
System:
The Portal to Texas History
2006 Pantex Plant Annual Illness and Injury Surveillance Report
The U.S. Department of Energy’s (DOE) commitment to assuring the health and safety of its workers includes the conduct of illness and injury surveillance activities that provide an early warning system to detect health problems among workers. The Illness and Injury Surveillance Program monitors illnesses and health conditions that result in an absence, occupational injuries and illnesses, and disabilities and deaths among current workers.
Date:
May 19, 2008
Creator:
United States. Department of Energy. Office of Health, Safety, and Security.
Object Type:
Report
System:
The UNT Digital Library
21st Century U.S. Energy Sources: A Primer
This report provides an overview of U.S. energy issues, and it serves as an initial resource document for related information, data, and CRS contacts. It is mainly organized around the major fuels and energy sources used in the United States and also highlights the role of the federal government, particularly the use of federal lands in energy production.
Date:
May 19, 2017
Creator:
Ratner, Michael
Object Type:
Report
System:
The UNT Digital Library
78th Texas Legislature, Regular Session, House Bill 1065, Chapter 78
Bill introduced by the Texas House of Representatives relating to the eligibility requirements to serve as a director of a groundwater conservation district.
Date:
May 19, 2003
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
78th Texas Legislature, Regular Session, Senate Bill 394, Chapter 79
Bill introduced by the Texas Senate relating to the Records Management Interagency Coordinating Council
Date:
May 19, 2003
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
78th Texas Legislature, Regular Session, Senate Bill 1091, Chapter 80
Bill introduced by the Texas Senate relating to the composition of the Recycling Market Development Board and the termination of certain duties of the General Land Office relating to the board and the recycling awareness campaign.
Date:
May 19, 2003
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
79th Texas Legislature, Regular Session, Senate Bill 15, Chapter 97
Bill introduced by the Texas Senate relating to civil claims involving exposure to asbestos and silica.
Date:
May 19, 2005
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, House Bill 1071, Chapter 58
Bill introduced by the Texas Senate relating to the required disclosure under the public information law of information pertaining to an employee or trustee of a public employee pension system.
Date:
May 19, 2009
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, Regular Session, House Bill 752, Chapter 38
Bill introduced by the Texas House of Representatives relating to the authority of certain municipalities to enter into an agreement with a school district to dedicate revenue from a tax increment fund to the district for the acquisition, construction, or reconstruction of an educational facility.
Date:
May 19, 2009
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, Regular Session, House Bill 782, Chapter 39
Bill introduced by the Texas House of Representatives relating to registration exemptions for certain foreign commercial motor vehicles.
Date:
May 19, 2009
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, Regular Session, House Bill 1213, Chapter 40
Bill introduced by the Texas House of Representatives relating to the promulgation by the commissioner of the General Land Office of rules authorizing the use on a public beach of a golf cart for the transportation of a person with a physical disability.
Date:
May 19, 2009
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, Regular Session, House Bill 1637, Chapter 42
Bill introduced by the Texas House of Representatives relating to normal weekly hours of work under the shared work unemployment compensation program.
Date:
May 19, 2009
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, Regular Session, House Bill 2546, Chapter 43
Bill introduced by the Texas House of Representatives relating to the continuation and functions of the Texas Military Preparedness Commission.
Date:
May 19, 2009
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, Regular Session, House Bill 3456, Chapter 44
Bill introduced by the Texas House of Representatives relating to the education and preparation of resident physicians.
Date:
May 19, 2009
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
81st Texas Legislature, Senate Bill 43, Chapter 45
Bill introduced by the Texas Senate relating to tuition and fee exemptions at public institutions of higher education for students who have been under the conservatorship of the Department of Family and Protective Services.
Date:
May 19, 2009
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History